| File: | src/lib/libcrypto/des/ncbc_enc.c |
| Warning: | line 146, column 18 Although the value stored to 'tout1' is used in the enclosing expression, the value is never actually read from 'tout1' |
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| 1 | /* $OpenBSD: ncbc_enc.c,v 1.7 2014/10/28 07:35:58 jsg Exp $ */ |
| 2 | /* |
| 3 | * #included by: |
| 4 | * cbc_enc.c (DES_cbc_encrypt) |
| 5 | * des_enc.c (DES_ncbc_encrypt) |
| 6 | */ |
| 7 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 8 | * All rights reserved. |
| 9 | * |
| 10 | * This package is an SSL implementation written |
| 11 | * by Eric Young (eay@cryptsoft.com). |
| 12 | * The implementation was written so as to conform with Netscapes SSL. |
| 13 | * |
| 14 | * This library is free for commercial and non-commercial use as long as |
| 15 | * the following conditions are aheared to. The following conditions |
| 16 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 17 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 18 | * included with this distribution is covered by the same copyright terms |
| 19 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 20 | * |
| 21 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 22 | * the code are not to be removed. |
| 23 | * If this package is used in a product, Eric Young should be given attribution |
| 24 | * as the author of the parts of the library used. |
| 25 | * This can be in the form of a textual message at program startup or |
| 26 | * in documentation (online or textual) provided with the package. |
| 27 | * |
| 28 | * Redistribution and use in source and binary forms, with or without |
| 29 | * modification, are permitted provided that the following conditions |
| 30 | * are met: |
| 31 | * 1. Redistributions of source code must retain the copyright |
| 32 | * notice, this list of conditions and the following disclaimer. |
| 33 | * 2. Redistributions in binary form must reproduce the above copyright |
| 34 | * notice, this list of conditions and the following disclaimer in the |
| 35 | * documentation and/or other materials provided with the distribution. |
| 36 | * 3. All advertising materials mentioning features or use of this software |
| 37 | * must display the following acknowledgement: |
| 38 | * "This product includes cryptographic software written by |
| 39 | * Eric Young (eay@cryptsoft.com)" |
| 40 | * The word 'cryptographic' can be left out if the rouines from the library |
| 41 | * being used are not cryptographic related :-). |
| 42 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 43 | * the apps directory (application code) you must include an acknowledgement: |
| 44 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 45 | * |
| 46 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 47 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 48 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 49 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 50 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 51 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 52 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 53 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 54 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 55 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 56 | * SUCH DAMAGE. |
| 57 | * |
| 58 | * The licence and distribution terms for any publically available version or |
| 59 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 60 | * copied and put under another distribution licence |
| 61 | * [including the GNU Public Licence.] |
| 62 | */ |
| 63 | |
| 64 | #include "des_locl.h" |
| 65 | |
| 66 | #ifdef CBC_ENC_C__DONT_UPDATE_IV |
| 67 | void DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, |
| 68 | DES_key_schedule *_schedule, DES_cblock *ivec, int enc) |
| 69 | #else |
| 70 | void DES_ncbc_encrypt(const unsigned char *in, unsigned char *out, long length, |
| 71 | DES_key_schedule *_schedule, DES_cblock *ivec, int enc) |
| 72 | #endif |
| 73 | { |
| 74 | DES_LONGunsigned int tin0,tin1; |
| 75 | DES_LONGunsigned int tout0,tout1,xor0,xor1; |
| 76 | long l=length; |
| 77 | DES_LONGunsigned int tin[2]; |
| 78 | unsigned char *iv; |
| 79 | |
| 80 | iv = &(*ivec)[0]; |
| 81 | |
| 82 | if (enc) |
| 83 | { |
| 84 | c2l(iv,tout0)(tout0 =((unsigned int)(*((iv)++))) , tout0|=((unsigned int)( *((iv)++)))<< 8L, tout0|=((unsigned int)(*((iv)++)))<< 16L, tout0|=((unsigned int)(*((iv)++)))<<24L); |
| 85 | c2l(iv,tout1)(tout1 =((unsigned int)(*((iv)++))) , tout1|=((unsigned int)( *((iv)++)))<< 8L, tout1|=((unsigned int)(*((iv)++)))<< 16L, tout1|=((unsigned int)(*((iv)++)))<<24L); |
| 86 | for (l-=8; l>=0; l-=8) |
| 87 | { |
| 88 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); |
| 89 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); |
| 90 | tin0^=tout0; tin[0]=tin0; |
| 91 | tin1^=tout1; tin[1]=tin1; |
| 92 | DES_encrypt1((DES_LONGunsigned int *)tin,_schedule,DES_ENCRYPT1); |
| 93 | tout0=tin[0]; l2c(tout0,out)(*((out)++)=(unsigned char)(((tout0) )&0xff), *((out)++)= (unsigned char)(((tout0)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((out)++)=(unsigned char )(((tout0)>>24L)&0xff)); |
| 94 | tout1=tin[1]; l2c(tout1,out)(*((out)++)=(unsigned char)(((tout1) )&0xff), *((out)++)= (unsigned char)(((tout1)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((out)++)=(unsigned char )(((tout1)>>24L)&0xff)); |
| 95 | } |
| 96 | if (l != -8) |
| 97 | { |
| 98 | c2ln(in,tin0,tin1,l+8){ in+=l+8; tin0=tin1=0; switch (l+8) { case 8: tin1 =((unsigned int)(*(--(in))))<<24L; case 7: tin1|=((unsigned int)(* (--(in))))<<16L; case 6: tin1|=((unsigned int)(*(--(in) )))<< 8L; case 5: tin1|=((unsigned int)(*(--(in)))); case 4: tin0 =((unsigned int)(*(--(in))))<<24L; case 3: tin0 |=((unsigned int)(*(--(in))))<<16L; case 2: tin0|=((unsigned int)(*(--(in))))<< 8L; case 1: tin0|=((unsigned int)(* (--(in)))); } }; |
| 99 | tin0^=tout0; tin[0]=tin0; |
| 100 | tin1^=tout1; tin[1]=tin1; |
| 101 | DES_encrypt1((DES_LONGunsigned int *)tin,_schedule,DES_ENCRYPT1); |
| 102 | tout0=tin[0]; l2c(tout0,out)(*((out)++)=(unsigned char)(((tout0) )&0xff), *((out)++)= (unsigned char)(((tout0)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((out)++)=(unsigned char )(((tout0)>>24L)&0xff)); |
| 103 | tout1=tin[1]; l2c(tout1,out)(*((out)++)=(unsigned char)(((tout1) )&0xff), *((out)++)= (unsigned char)(((tout1)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((out)++)=(unsigned char )(((tout1)>>24L)&0xff)); |
| 104 | } |
| 105 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
| 106 | iv = &(*ivec)[0]; |
| 107 | l2c(tout0,iv)(*((iv)++)=(unsigned char)(((tout0) )&0xff), *((iv)++)=(unsigned char)(((tout0)>> 8L)&0xff), *((iv)++)=(unsigned char )(((tout0)>>16L)&0xff), *((iv)++)=(unsigned char)(( (tout0)>>24L)&0xff)); |
| 108 | l2c(tout1,iv)(*((iv)++)=(unsigned char)(((tout1) )&0xff), *((iv)++)=(unsigned char)(((tout1)>> 8L)&0xff), *((iv)++)=(unsigned char )(((tout1)>>16L)&0xff), *((iv)++)=(unsigned char)(( (tout1)>>24L)&0xff)); |
| 109 | #endif |
| 110 | } |
| 111 | else |
| 112 | { |
| 113 | c2l(iv,xor0)(xor0 =((unsigned int)(*((iv)++))) , xor0|=((unsigned int)(*( (iv)++)))<< 8L, xor0|=((unsigned int)(*((iv)++)))<< 16L, xor0|=((unsigned int)(*((iv)++)))<<24L); |
| 114 | c2l(iv,xor1)(xor1 =((unsigned int)(*((iv)++))) , xor1|=((unsigned int)(*( (iv)++)))<< 8L, xor1|=((unsigned int)(*((iv)++)))<< 16L, xor1|=((unsigned int)(*((iv)++)))<<24L); |
| 115 | for (l-=8; l>=0; l-=8) |
| 116 | { |
| 117 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); tin[0]=tin0; |
| 118 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); tin[1]=tin1; |
| 119 | DES_encrypt1((DES_LONGunsigned int *)tin,_schedule,DES_DECRYPT0); |
| 120 | tout0=tin[0]^xor0; |
| 121 | tout1=tin[1]^xor1; |
| 122 | l2c(tout0,out)(*((out)++)=(unsigned char)(((tout0) )&0xff), *((out)++)= (unsigned char)(((tout0)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout0)>>16L)&0xff), *((out)++)=(unsigned char )(((tout0)>>24L)&0xff)); |
| 123 | l2c(tout1,out)(*((out)++)=(unsigned char)(((tout1) )&0xff), *((out)++)= (unsigned char)(((tout1)>> 8L)&0xff), *((out)++)=(unsigned char)(((tout1)>>16L)&0xff), *((out)++)=(unsigned char )(((tout1)>>24L)&0xff)); |
| 124 | xor0=tin0; |
| 125 | xor1=tin1; |
| 126 | } |
| 127 | if (l != -8) |
| 128 | { |
| 129 | c2l(in,tin0)(tin0 =((unsigned int)(*((in)++))) , tin0|=((unsigned int)(*( (in)++)))<< 8L, tin0|=((unsigned int)(*((in)++)))<< 16L, tin0|=((unsigned int)(*((in)++)))<<24L); tin[0]=tin0; |
| 130 | c2l(in,tin1)(tin1 =((unsigned int)(*((in)++))) , tin1|=((unsigned int)(*( (in)++)))<< 8L, tin1|=((unsigned int)(*((in)++)))<< 16L, tin1|=((unsigned int)(*((in)++)))<<24L); tin[1]=tin1; |
| 131 | DES_encrypt1((DES_LONGunsigned int *)tin,_schedule,DES_DECRYPT0); |
| 132 | tout0=tin[0]^xor0; |
| 133 | tout1=tin[1]^xor1; |
| 134 | l2cn(tout0,tout1,out,l+8){ out+=l+8; switch (l+8) { case 8: *(--(out))=(unsigned char) (((tout1)>>24L)&0xff); case 7: *(--(out))=(unsigned char)(((tout1)>>16L)&0xff); case 6: *(--(out))=(unsigned char)(((tout1)>> 8L)&0xff); case 5: *(--(out))=(unsigned char)(((tout1) )&0xff); case 4: *(--(out))=(unsigned char )(((tout0)>>24L)&0xff); case 3: *(--(out))=(unsigned char)(((tout0)>>16L)&0xff); case 2: *(--(out))=(unsigned char)(((tout0)>> 8L)&0xff); case 1: *(--(out))=(unsigned char)(((tout0) )&0xff); } }; |
| 135 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
| 136 | xor0=tin0; |
| 137 | xor1=tin1; |
| 138 | #endif |
| 139 | } |
| 140 | #ifndef CBC_ENC_C__DONT_UPDATE_IV |
| 141 | iv = &(*ivec)[0]; |
| 142 | l2c(xor0,iv)(*((iv)++)=(unsigned char)(((xor0) )&0xff), *((iv)++)=(unsigned char)(((xor0)>> 8L)&0xff), *((iv)++)=(unsigned char )(((xor0)>>16L)&0xff), *((iv)++)=(unsigned char)((( xor0)>>24L)&0xff)); |
| 143 | l2c(xor1,iv)(*((iv)++)=(unsigned char)(((xor1) )&0xff), *((iv)++)=(unsigned char)(((xor1)>> 8L)&0xff), *((iv)++)=(unsigned char )(((xor1)>>16L)&0xff), *((iv)++)=(unsigned char)((( xor1)>>24L)&0xff)); |
| 144 | #endif |
| 145 | } |
| 146 | tin0=tin1=tout0=tout1=xor0=xor1=0; |
Although the value stored to 'tout1' is used in the enclosing expression, the value is never actually read from 'tout1' | |
| 147 | tin[0]=tin[1]=0; |
| 148 | } |